// -------------------------------------------------------------------
// Image Thumbnail Viewer Script- By Dynamic Drive, available at: http://www.dynamicdrive.com
// Last updated: July 7th, 2008- Fixed enlarged image not showing in IE sometimes
// -------------------------------------------------------------------

function GetFullTop(item)
{
	if(item.tagName!='BODY')
	{
		if(item.tagName!='TR')
		{
			return item.offsetTop+GetFullTop(item.parentNode);
		}
		else
		return GetFullTop(item.parentNode);
	}
	else
	{
		return 0;
	}
}

function GetFullLeft(item)
{
	if(item.tagName!='BODY')
	{
		return item.offsetLeft+GetFullLeft(item.parentNode);
	}
	else
	{
		return 0;
	}
}

var thumbnailviewer={
enableTitle: true, //Should "title" attribute of link be used as description?
enableAnimation: true, //Enable fading animation?
definefooter: '<div class="footerbar">Закрыть X</div>', //Define HTML for footer interface
defineLoading: '<img src="/images/loading.gif" /> Загрузка изображения...', //Define HTML for "loading" div

/////////////No need to edit beyond here/////////////////////////

scrollbarwidth: 16,
opacitystring: 'filter:progid:DXImageTransform.Microsoft.alpha(opacity=10); -moz-opacity: 0.1; opacity: 0.1',
targetlinks:[], //Array to hold links with rel="thumbnail"

createthumbBox:function(){
//write out HTML for Image Thumbnail Viewer plus loading div
document.write('<div id="fadeblock" onclick="thumbnailviewer.closeit();"></div>')
document.write('<div id="thumbBox" onClick="thumbnailviewer.closeit();"><div id="thumbImage"></div>'+this.definefooter+'</div>')
document.write('<a href="#"><img id="littlethumbBox" onmouseout="this.style[\'display\']=\'none\'"/></a>')
document.write('<div id="thumbLoading">'+this.defineLoading+'</div>')
this.littleThumb=document.getElementById("littlethumbBox")
this.fadeblock=document.getElementById("fadeblock")
this.thumbBox=document.getElementById("thumbBox")
this.thumbImage=document.getElementById("thumbImage") //Reference div that holds the shown image
this.thumbLoading=document.getElementById("thumbLoading") //Reference "loading" div that will be shown while image is fetched
this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body //create reference to common "body" across doctypes
},


centerDiv:function(divobj){ //Centers a div element on the page
var ie=document.all && !window.opera
var dom=document.getElementById
var scroll_top=(ie)? this.standardbody.scrollTop : window.pageYOffset
var scroll_left=(ie)? this.standardbody.scrollLeft : window.pageXOffset
var docwidth=(ie)? this.standardbody.clientWidth : window.innerWidth-this.scrollbarwidth
var docheight=(ie)? this.standardbody.clientHeight: window.innerHeight
var docheightcomplete=(this.standardbody.offsetHeight>this.standardbody.scrollHeight)? this.standardbody.offsetHeight : this.standardbody.scrollHeight //Full scroll height of document
var objwidth=divobj.offsetWidth //width of div element
var objheight=divobj.offsetHeight //height of div element
var topposition=(docheight>objheight)? scroll_top+docheight/2-objheight/2+"px" : scroll_top+10+"px" //Vertical position of div element: Either centered, or if element height larger than viewpoint height, 10px from top of viewpoint
divobj.style.left=docwidth/2-objwidth/2+"px" //Center div element horizontally
divobj.style.top=Math.floor(parseInt(topposition))+"px"
divobj.style.visibility="visible"
},

showthumbBox:function(){ //Show ThumbBox div

thumbnailviewer.thumbLoading.style.visibility="hidden" //Hide "loading" div
this.centerDiv(this.thumbBox)
if (this.enableAnimation){ //If fading animation enabled
this.currentopacity=0.1 //Starting opacity value
this.opacitytimer=setInterval("thumbnailviewer.opacityanimation()", 20)
}
},

showFadeBlock:function(){ //Show FadeBlock
var ie=document.all && !window.opera
var dom=document.getElementById
var docwidth=(ie)? this.standardbody.clientWidth : window.innerWidth-this.scrollbarwidth
var docheight=(ie)? this.standardbody.clientHeight: window.innerHeight
var docheightcomplete=(this.standardbody.offsetHeight>this.standardbody.scrollHeight)? this.standardbody.offsetHeight : this.standardbody.scrollHeight //Full scroll height of document
this.fadeblock.style['height']=docheightcomplete+'px';
this.fadeblock.style['width']=(docwidth-1)+'px';
this.fadeblock.style['left']=0+'px';
this.fadeblock.style['top']=0+'px';
this.fadeblock.style['display']="block";
},

showLittleThumb:function(item){ //Show FadeBlock
this.littleThumb.style['visibility']='hidden';
this.littleThumb.style['display']='';
var imgs=item.getElementsByTagName('IMG');
this.littleThumb.setAttribute("src",imgs[0].getAttribute("src"));
this.littleThumb.style['left']=(GetFullLeft(item)-(this.littleThumb.clientWidth-imgs[0].width)/2)+'px';
if(this.littleThumb.complete)
{
	this.littleThumb.style['top']=(GetFullTop(item.firstChild)-imgs[0].height-(this.littleThumb.clientHeight-imgs[0].height)/2+1)+'px';
}
/*var s='';c=0;
for(i in imgs[0])
{
	c++;
	if(c>80)
	if(item[i]) s=s+i+'='+imgs[0][i]+'\n';
}
alert(s);*/
this.littleThumb.style['visibility']='visible';
},

loadimage:function(link){ //Load image function that gets attached to each link on the page with rel="thumbnail"
if (this.thumbBox.style.visibility=="visible") //if thumbox is visible on the page already
this.closeit() //Hide it first (not doing so causes triggers some positioning bug in Firefox
var imageHTML='<img src="'+link.getAttribute("href")+'" style="'+this.opacitystring+'" />' //Construct HTML for shown image
if (this.enableTitle && link.getAttribute("title")) //Use title attr of the link as description?
imageHTML+='<br />'+link.getAttribute("title")
this.centerDiv(this.thumbLoading) //Center and display "loading" div while we set up the image to be shown
this.thumbImage.innerHTML=imageHTML //Populate thumbImage div with shown image's HTML (while still hidden)
this.featureImage=this.thumbImage.getElementsByTagName("img")[0] //Reference shown image itself
if (this.featureImage.complete)
thumbnailviewer.showthumbBox()
else{
this.featureImage.onload=function(){ //When target image has completely loaded
thumbnailviewer.showthumbBox() //Display "thumbbox" div to the world!
}
}
if (document.all && !window.createPopup) //Target IE5.0 browsers only. Address IE image cache not firing onload bug: panoramio.com/blog/onload-event/
this.featureImage.src=link.getAttribute("href")
this.featureImage.onerror=function(){ //If an error has occurred while loading the image to show
thumbnailviewer.thumbLoading.style.visibility="hidden" //Hide "loading" div, game over
}
},

setimgopacity:function(value){ //Sets the opacity of "thumbimage" div per the passed in value setting (0 to 1 and in between)
var targetobject=this.featureImage
if (targetobject.filters && targetobject.filters[0]){ //IE syntax
if (typeof targetobject.filters[0].opacity=="number") //IE6
targetobject.filters[0].opacity=value*100
else //IE 5.5
targetobject.style.filter="alpha(opacity="+value*100+")"
}
else if (typeof targetobject.style.MozOpacity!="undefined") //Old Mozilla syntax
targetobject.style.MozOpacity=value
else if (typeof targetobject.style.opacity!="undefined") //Standard opacity syntax
targetobject.style.opacity=value
else //Non of the above, stop opacity animation
this.stopanimation()
},

opacityanimation:function(){ //Gradually increase opacity function
this.setimgopacity(this.currentopacity)
this.currentopacity+=0.1
if (this.currentopacity>1)
this.stopanimation()
},

stopanimation:function(){
if (typeof this.opacitytimer!="undefined")
clearInterval(this.opacitytimer)
},


closeit:function(){ //Close "thumbbox" div function
this.stopanimation();
this.fadeblock.style['display']='none';
this.thumbBox.style.visibility="hidden"
this.thumbImage.innerHTML=""
this.thumbBox.style.left="-2000px"
this.thumbBox.style.top="-2000px"
},

cleanup:function(){ //Clean up routine on page unload
this.fadeblock=null
this.thumbLoading=null
if (this.featureImage) this.featureImage.onload=null
this.featureImage=null
this.thumbImage=null
for (var i=0; i<this.targetlinks.length; i++)
this.targetlinks[i].onclick=null
this.thumbBox=null
},

dotask:function(target, functionref, tasktype){ //assign a function to execute to an event handler (ie: onunload)
var tasktype=(window.addEventListener)? tasktype : "on"+tasktype
if (target.addEventListener)
target.addEventListener(tasktype, functionref, false)
else if (target.attachEvent)
target.attachEvent(tasktype, functionref)
},

init:function(){ //Initialize thumbnail viewer script by scanning page and attaching appropriate function to links with rel="thumbnail"
if (!this.enableAnimation) this.opacitystring=""
var pagelinks=document.getElementsByTagName("a")
for (var i=0; i<pagelinks.length; i++)
{
	if (pagelinks[i].getAttribute("rel") && pagelinks[i].getAttribute("rel")=="thumbnail0")
	{
		pagelinks[i].onclick=function()
										{
										thumbnailviewer.stopanimation() //Stop any currently running fade animation on "thumbbox" div before proceeding
										thumbnailviewer.loadimage(this) //Load image
										return false
										}
		this.targetlinks[this.targetlinks.length]=pagelinks[i] //store reference to target link
	} //end if statement
	if (pagelinks[i].getAttribute("rel") && pagelinks[i].getAttribute("rel")=="thumbnail1")
	{
		pagelinks[i].onclick=function()
										{
										thumbnailviewer.showFadeBlock()
										thumbnailviewer.stopanimation() //Stop any currently running fade animation on "thumbbox" div before proceeding
										thumbnailviewer.loadimage(this) //Load image
										return false
										}
		this.targetlinks[this.targetlinks.length]=pagelinks[i] //store reference to target link
	} //end if statement
	if (pagelinks[i].getAttribute("rel") && pagelinks[i].getAttribute("rel")=="thumbnail2")
	{
		this.littleThumb.parentNode.onclick=function()
										{
										thumbnailviewer.showFadeBlock()
										thumbnailviewer.stopanimation() //Stop any currently running fade animation on "thumbbox" div before proceeding
										thumbnailviewer.loadimage(this) //Load image
										this.firstChild.style['display']='none'
										return false
										}
		this.targetlinks[this.targetlinks.length]=pagelinks[i] //store reference to target link
		pagelinks[i].onmousemove=function()
										{
										thumbnailviewer.showLittleThumb(this);
										thumbnailviewer.littleThumb.parentNode.setAttribute("href",this.getAttribute("href"));
										return false
										}
		this.targetlinks[this.targetlinks.length]=pagelinks[i] //store reference to target link
	} //end if statement
} //END FOR LOOP
//Reposition "thumbbox" div when page is resized
this.dotask(window, function(){if (thumbnailviewer.thumbBox.style.visibility=="visible") thumbnailviewer.centerDiv(thumbnailviewer.thumbBox)}, "resize")
} //END init() function

}

thumbnailviewer.createthumbBox() //Output HTML for the image thumbnail viewer
thumbnailviewer.dotask(window, function(){thumbnailviewer.init()}, "load") //Initialize script on page load
thumbnailviewer.dotask(window, function(){thumbnailviewer.cleanup()}, "unload")